Metal door construction.



G. H. BURBIDGE. METAL DOOR CONSTRUCTION. APPLICATION FILED AUG 4, i911.-

. Patented N v. 24, 1914.

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messes ploy. eel-. .isire.

implication filed August 4, 1811. Serial No. ii-22,4520.

T all whom it may concern:

Be it known that 1, CHARLES 1-1. BUR- moon, a citizen of the United States, and a frames, interior and exterior finishi'n s, etc,-

in sectional parts so es to be adaptec to he interlocked when assembled and the parts firmly held together without the use of bolts. screws, or like means; and to "evidei *tiug the doors, sash, etc, to he made either hi. or plain in design ruble and pi'matically lire-proof.

Iii invention further provides for e s plified construction for making metal. cloors or the like by which great saving of lei-iii time oncl labor is made as compared with the forms of this class oi consuruetion at present in use. i

with these and other objects in view my invention will be more particularly {iv scribed with reference to she accompanying drawing which forms a part of this specifi- 5 cation, aiiliwill'theo pointed out in appended claims.

as well as being 1w In the drawing. Figure 1 is sicle elevetion of one form of metal (loo-r constructed according to my invention. 1 1g. 2 is section taken on the line ii -Ci of Fig. 1..

". 3 is a section taken on the line 1ii-- .r "if Fig. 1. Jig. :1 ion taken on y the line lV-IV of i. Big. 5 :2 section relies on illuline Y -L of Fi 1, Fig. 45 G :1 section taken on the i of Fig. 1. Fig. 7 is 11. pm

01111 of channel lfmil or el 1 L:., T 110L108 l.

have illus breieol ii; in. connection Wish 0. metal door, as 10, consis of two enii. stiles 1i and 12, :1 cross-mi 13.. too i, and 11 bottom rail l5 i hough it iseiiclenfe w that other forms of doors having, for stance, as many intermediate center stirs and rails as desired may also be constructed. Between saicl sties and rails may he he panels 16 and 1? metal, or of. preferred material. The end. stiles 11 a1 12 are alike in formation. and usually eh some in size. Each of the stiles 11 and 12, has -':Wo opposed farce-plates or members and l9 whieh are disposed on different rela- '7 tire planes, as viewed in cross-section, and '0 as one of the lengthwise edges of seiei face plates is provided an end-plste or member 20. The face-plates or members 18 one and the end-pi member 20 may 1 m itorniee by a 3 e .fi sheet 05. metal. or

.i 1. IL. in

.ngeniens ii 1.. i%6'.1. r1 lBS JGHCliDg smiece oi eeci. plates so as to provide thereheizween spaces,

)5 us 2&- sn 25. @imilm'ly so 1e e115. stiles and 12 the top rail i4. and hot-.0111 ran 15 siso formed alike. As slow-1n tion, Fig. 5, each. of aid. rails M a face-plete or member and spaced apart peraiiei relation 9. second. fsce-piete or member 531". one of lengtlm'ise edges of: the face-ole. 6 and is an end-plate oi niein may he formed iniegrnl W plates by :lnguiai'iy beniiing tel so as Z'o .u

wen i}! cunml s i is disposal in 3 '2'. "to the rorrespouilizig sui :i'ucopinws so as in pro ide spn the" between. he the o ends of ihe lop rail am is proviilell a ioug'ac 2% =1 and r st again ii i l i nhieh employed only one ernss rail it is to he n mood that types olf doors he eons'trimt ed aeeording to my invention Wl t'h hare any desired number of said The en: ail 13, as indicatel "."s-seetien Fig. 6, has a hollow body i :d of two spaeed apart parallel ar- .l fare-plates or members 37 and 38. opposite lengthn' of each of the jar-e i i iii-5.

-T and 58 are inwardly enrven to prm ide strips, as 2:33) and h), which are directed in parallel arrzmgeznent with re ati 'n to the eorrespmiding surface of each of: said fare-plates whereby spaces t1 and 4:2 een and upon the opp l cross se ends of each of said fare-- plates ii:- a straight strip, as and 44: Big. h. \rhieh a U ue 7 is provided and. whir h are f rmed ny rei'hieing the respecti wands of the. 'faee plates and i the panels 16 and 1 in the door 10 each of the stiles ll and i2, top rail 1. hottona rail 15, and cross rail 13am in'ovided with a, panel bracket-'1 All or the panel liraehets '3 are similarly lashi ned each haring two parallel plates, 'h' and 4, which are spar apart at a sailirient' di anee to rest against the inwardly curred p5 of eaeh face-plate of the rariiles and rail when positioned therehetween. llaeh oi? the corresponding ends of the parallel plates 46 and at? are curred so to form a substantially r-onrex body 5 8 in order to properly hold in the apex at which iorined a greere 43: .l'or r reption of the ends of the door panels it and i7. il hen the various above dew rihed parts ol" the stiles 11 and 12, top rail l.-, hotto a rail l5, and cross-rail 13 are asseinhled l provide a inching element adapted to securely hold said parts in locked engagement and the use of WlliCll also serves to strengl hen the structuralparts or the door as well as permitting the use of i pohweltlmg for connecting said parts, thns dispensing with the use of bolts, screws, or the like.

llaeh locking; element; or key 50 has a blirlgllllflfplnlt} or rneniher .71 and upon the len hrrrae edges elf said hridging-plale is provided a snhstantially lslia 'ied gripping member, as 02 and 53, ea h ml which are preterahly Formed. by angularly hending opposite portion of a strip of metal length rise ther in a dirwrtiun to lo-rm two similarly dispo ed arms and reeurring each arm, as S-l, so as to Your a s end arm spaced in parallel relation with eaeh oi" the first arms \rherehy a space, as 55, may he prorided lhere ietween.

To close the open opposed ends of the ti 1': 11 and 12 between the tare-plates at he apper edges of he top rail lland hotoni rail. 15 may be arranged a channel-bar 1g eien'ient 56, The channel-h:. r 3(5- has a suhstan' body 57, comp. upon t edges d; disposed llarrges or projecting plates U0. (.lne of the ehannel-hars-r it} is snital iji conneetml hetueen the face plates adjacent to the upper edge of the top rail il and ad a may the ends of the stiles so as to :ni-oon'nnodate therein the ends oi" the still'ening eleinei'itsath A portion at? the Hang, 5i and G0 oi the part adapted to he inserted into the stiles 1.1 and 1'1 re reduced, as at 1 and ('32, and a substantially rectangular cap, as 53, is pro- \ided to snugly it upon said rediieed per tions. in some doors the top edge of the rail l land the underneath edge of the liottoin rail in are open when the parts thereol' are :t. ll1 )lQl, and in suth terms oi doors the rlunlnel-har l' still'ening element 23!) is Formed oi sullieient lenglhto extend entirely through said rails and inte the hotly at the ends ol' the stiles ill and 12. For the pur pose o then closing the open top and bot tom edges oi the dzror the upper portions of the Han -rs and till are reduced the entire length thereof as indicated hy doited lines 3 and a cap, as (32}, of; saliiei' length to incl me th entire open edges oil the door is titted npmi the reduced portions ol said flanges. r

in the foregoing description l have emhodied the prel'erred Form of my invention, hat; I do not wish to he understood as limitin myself thereto, tiff Q. am aware that inediliralions may he iuade therein without tie-- parting from the 'jirineii'de or saerilieing any of the advantages of this invention, there fore I reserve to myself the rif ht to make such changes fairly fall Within. the scope thereof.

Haring thus described my invention, it elaim as new and desire to secure by Let;- ters Pater-Ll; I-

1. in a metal door eonstruetien, the coin-- hination of stiles and "ails adapted to retain panels, said stiles and rails being sub stantially U-shapecl in cross-section, and eaeh ol. theseparts having the edges rellexirely bent inwardly, whereby a channel. is for1ne extending flanges 0n the ends of aelrrail, adapted to be inserted endwise in the ehannels of the stiles, and paneh inn-reliefs, :aeh having a roove adapted to receive the edge of a panel, and. having two straight flanges adapted to fit edgewise in the channel of the adj acent' stile or rail, and a key-member substantially U-shaped in cross section, and having reflexively bent of each rail adapted to be inserted endwise' in the channels of the adjacent stiles, a plurality of panel brackets, each having two reflexively bent extended straight flanges adapted to fit. edgewise in the channel of the adjacent stile or rail, and a plurality of key-members, each being U-shaped in crosssection and having extended straight flanges reflexirely bent, said key-members being adapted to be inserted in the channels of the stiles and rails, and between the extended straight flanges of the panel-brackets, the flanges of the rails and stiles and the flanges of the panel-brackets being interlocked with the reflexively bent flanges of the key memb rs, said key-members being first put in place in the channel, the flanges of the panel brackets, and the flanges of the rails being inserted thereafter, substantially as and for the purposes set'forth.

3.111 a metal door construction having stiles, a top rail, and a bottom rail of the character described, a middle rail compris ing two side plates, each having a bent end portion or flange adapted to be inserted endwise in the adjacent channel in the stile of the door, each ofsaid side plates having t edges reflexively bent inwardly Whereby an open channel is formed at the top and bottom of the rail, said channel being adapted to receive mating parts comprising panel brackets, said panel brackets, havin a groove to receive the edge of a panel and also having extending straight flanges adapted to be inserted edgewise between the flanges of the side plates of the rail, and key members substantially U-shaped in cross-section, and having reflexively bent straight flanges, said key-members being adapted to be inserted between the flanges of the panel-brackets, the flanges thereof interlocking with the reflexively bent flange of the side plates, said key-members being first put in position, and the r anel brackets being inserted edgewise thereafter, substantially as and for the purposes set forth. i

4. In a metal door construction of the character described, the combination with a bent metal frame substantially U-shaped in cross-section, and having two side plates connected by an edge plate, the edge .of said side plates being reflexively bent inwardly whereby a channel is formed longitudinally of the inner edge portion of the frame, of a panel bracket having a substantially U-shaped channel to receive the edge of a panel, reflexively bent extending straight flanges adapted to fit edgewise within the channel of the frame, and substantially U-shaped key-members having reflexively bent flanges interlocking with the reflexively bent flangesof the side plates of the frame, said key-members being first put in place in the channel, and the panelbracket being inserted edgewise thereafter, substantially as and for the purposes set forth.

This specification signed and witnessed this second day of August A. D. 1911.

CHARLES H. BURBIDGE. Witnesses:

Roe'r. B. ABBOTT, 'E. M. Jnnxn. 

